I'm so sorry as this does sound upsetting but I think you are indeed being given the brush off - and I'm not saying this from the comfy position of having an angel child - I've got two very boisterous boys. I'm sure I've had similar treatment.
My two year old has been a hitter shover and at his worst I've had parents sweeping their children out of range when he's arrived at a playground and definite cold shoulders at the coffee table. I rarely bother making new friends and have long since stopped meeting anyone's gaze, if he's tantrumming just picked him up and left.
As to what to do, I recommend pulling your horns in a bit - I stopped going to coffee and playgroups where he was clearly not enjoying the company of the others (and it was mutual), I was getting stressed and others were finding his presence irritating. Funnily enough sitting with some buttons and a thread at home or helping me do some housework, or just pottering with his cars resulted in a calmer child. I still think he's one of natures introverts actually, he's not fond of playing "with".
If she has all that energy, once she stops being frustrated at the world I am sure she will be able to direct it somewhere amazing - is she talking as much as her peers? DS2's been better since his language has come on. Maybe chat to the Health Visitor to see if they have any ideas of how to rake her off the ceiling. My HV proclaimed DS2 to be normal I should add).
My other son is pretty spirited too - DS1 can't walk anywhere - he JIVES, it is maddening when I see people with children pacing moderately next to their parent, playing calmly. He's more social and likes making friends and has never hit anyone so his energy is easier to direct. We go swimming a LOT.
Hope that ramble is helpful - you're not the only parent in those situations, it doesn't mean you're hopelessly indulging her behaviour or that you are a bad parent, or if you are I am too.